Components Of Deferred Tax Assets (Liabilities) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Deferred tax assets:
Allowance for loan losses	$ 32,275	$ 44,604	$ 60,174
OREO valuation allowance and other loss reserves	17,101	12,094	10,835
Federal NOL carryforwards	101,629	82,885	61,433
State NOL carryforwards	20,929	18,178	14,906
Unrealized gains (losses)			7,984
Other	3,629	3,851	4,310
Total deferred tax assets	175,563	161,612	159,642
Valuation allowance	(162,077)	(149,831)	(143,505)
Adjusted deferred tax assets	13,486	11,781	16,137
Deferred tax liabilities:
FHLB stock dividends	(1,928)	(2,636)	(3,962)
Mortgage servicing rights	(8,754)	(8,825)	(9,884)
Unrealized securities gains, net	(1,435)	(53)
Other	(1,369)	(267)	(2,291)
Total deferred tax liabilities	(13,486)	(11,781)	(16,137)
Net deferred tax assets